jMetal is an object-oriented Java-based framework for multi-objective optimization with metaheuristics. The Web page of the project is: http://jmetal.github.io/jMetal/. Former jMetal versions can be found in SourceForge. The current version is jMetal 5.6.
You can find the last released versions of jMetal on the Maven Central Repository.
To use jMetal in your project, you need at least the jmetal-core artifact.
It provides various components used to implement jMetal algorithms.
To implement your own, you only need this package.
jMetal comes with various algorithms already implemented, which you can obtain by adding the jmetal-algorithm artifact.
If you are more interested in experimenting with your own algorithms, you can instead add the jmetal-problem artifact to obtain various problems to solve.
You can of course add both of them to try combinations.
If you want to go further by running and evaluating different combinations, you can finally add the jmetal-exec artifact, which comes with various utilities.
The jMetal development version is hosted in this repository; this way, interested users can take a look to the new incoming features in advance.
If you are interested in contributing with your ideas and comments, please take a look at the current discussions in the Issues section.
- mIBEA. Variant of IBEA contributed buy @vinixnan.
- Added the DynamicDoubleProblem class, which allows to define a double problem dynamically.
- Class ConstrainedProblem is deprecated, and all the problems depending on it have been refactored.
- A method
getVariables()has been added to classSolution. - The NSGAII class has been refactored to allow to indicate the size of the mating pool and the offspring population. This allows, for example, to configure a state version of it by assigning the values
matingPoolSize = 2andoffspringPopulationSize = 1, so classes such as SteadyStateNSGAII are not necessary. All the classes related to NSGA-II have been refactored as a consequence.
- Fixed a bug in class EnviromentalSelection. Thanks to @zorrozork
The documentation is hosted in https://github.com/jMetal/jMetalDocumentation
A.J. Nebro, J.J. Durillo, M. Vergne: "Redesigning the jMetal Multi-Objective Optimization Framework". Proceedings of the Companion Publication of the 2015 on Genetic and Evolutionary Computation Conference (GECCO Companion '15) Pages 1093-1100. DOI: http://dx.doi.org/10.1145/2739482.2768462
Coverage data of the jmetal-core package reported by IntelliJ Idea:
| Class % | Method % | Line % |
|---|---|---|
| 58% (122/210) | 42% (529/1236) | 40% (2524/6263) |